SACE Stage 2 Earth And Environmental Science Practice Questions - SACE Stage 2 Earth And Environmental Science External Assessment Exam

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A zircon crystal extracted from an Australian granite sample contains 25% parent 235U and 75% daughter 207Pb. Given that the half-life of 235U is 704 million years, what is the radiometric age of the granite?

352 million years 704 million years 1,408 million years 2,112 million years

Correct Answer:

1,408 million years

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